Lighter for gas burners



LIGHTER FR GAS BURNERS Onriginal Filed Aug. 31, ).940

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Patented Jan. 205, 1944 waukee Gas Milwaukee, Wis., Specialty Company,Milwaukee,

assignor to Mil- Wis.. a corporation of Wisconsin Original applicationAn 354;'963. Divided 1941, Serial No.

3 Claims.

This invention relates to lighters for gas burners and has to doparticularly with automatic lighters of the type in which there is apilot burner provided with a torch hood having flash tubes leading tothe respective main burners, adapted when the burner is turned'on toconvey gas to the pilot burner where it is ignited and the resultingflame flashed back through the tube to light the main burner.

The present application is a division of .my

lust 31, 1940, Serial No.l and this 393,705

application May 16.

(ci. s-115) the torch hood.

copending application Serial No. 354,963, filed August 31, 1940.

One of the main objects of the invention is' to provide a lighter ofsimple, inexpensive and and embodying a fuel supply tube for thelighter, having a laterally opening port in the wall tip being securedto this tube over the port therein, with the interior of the tippositioned to receive fuel from the tube through said port, andpreferably with the base of the tip separated from the tube along aportion thereof vfor the admission of air to said tip. i

Itis also an object of the invention to provide a simple, inexpensive,and improved mounting of the torch hood on the lighter tube, andparticularly an improved mounting in which the lighter tube extendsthrough an opening in the side of the hood and has its outer endflattened together to close the outer end of the tube, with the attenedend of the tube projecting through an opening in the opposite side ofthe hood, the projecting flattened end of the tube being prefof the hoodalong the tube.

Further objects and advantages of the invention will appear from thefollowing detailed description, taken in connection with theaccompanying drawing in which:

Figure 1 is a perspective view of a lighter embodying my presentinvention;

Figure 2 is a fragmentary vertical section on an enlarged scale throughthe torch hood. of the lighter taken substantially on the line 2-2'0!Figure 1;

Figure 3 is a vertical section through the lighter tube and pilot tip,taken on the line 3-3 of Figure 2; A

Figure 4 is a sectional View through the pilot adjustment valve betweenthe main fuel supply pipe or manifold and the lighter tube; and

Figure 5 is a vertical section taken dinally through one of the lightershowing the injection tip at the outer tubes and end of the thereof, thepuoi burner longitufeed pipe (not shown) to which A in the usual way atthe end nearest the mani- -relative to the burner II.

air is admitted Referring now .usual fuel supply cated at I 0. Thementarily at Il in Figure 1, fed with' fuel from the manifold fold.

The lighteris provided in appropriate position This lighter comprisesY'a 'lighter tube I2 connected to the manifold i0 erably turnedlaterally to ,prevent displacement tube and the adjustable anddetachable 'con- 68 by the pilot adjusting valve I3, The lighter tube I2leads to the pilot tip I4 which is positioned at an appropriate distancefrom the burner II. Although only one burner is shown, it is of courseunderstood that gas ranges for example, embody a number ofburners-usually four-'and the pilot tip I4 with its torch hood, to bepresently described,'are disposed centrally between these circularlyarranged burners.

The tube I2 extends through an opening I5 in one side of the wall of thesmall, compact, annular torch hood I6, and the outer end of the wall ofthe tube I2 is attened together at Il to close the outer end of thetube, providing a hat oblong terminal element therefor having its longeraxis extending horizontally. The outer attened end I1 projects through acorrespondlngly shaped opening I8 in the opposite side of the hood I6,and the projecting flattened end of the tube is (Figure 2) to preventdisplacement of the hood I6 from the outer end of the tube I Inpositions substantially centrallywthin the annular wall of the hood I6the top of the tube I2 has a laterally opening port 20. The pilot tip I6is shown as comprising an outertip part 2i and an inner tipl part 22having its base secured at 23 to the outer tip part. The inner tip part22 is of Venturi-like character and is protected by the outer tip partfrom the heat of the llame which is dashed through the tube to eliminategum deposits and clogging of the tip. The resulting tip is alsowind-proof, i. e., it is of such a character that the pilot will not beaccidentally blown out by blasts of air. The top of the inner tip part22 terminates short of the top of the outer tip part 2l to deliver thefuel into the outer tip part and this outer tip part has a plurality ofequally spaced ports 25, one, for example, for each of the ash tubes ofthe lighter.

AThe base of the outer tip part is shown as inner end of the tube andpreferably turned laterally at I8 ilanged outwardly at 28. spot-weldedat 21 or otherwise suitably secured to the tube l2 on opposite sides ofthe port 20. The base of the pilot tip is separated from the tube I2along the intermediate portion adjacent the port 20 for the admission ofair, as shown at 28 in Figure 3. The resulting pilot burner is of thecharacter of a Bunsen burner, and the pilot burns with a blue name.

Each flash tube-four of these tubes being shown in the drawing-comprisesan outer extension tube 30 and an inner swivel tube 3l telescoping overthe outer tube. The outer end of the tube' 30 has an injection tip 32spot-welded at 33 (Figure 5) or otherwise suitably secured to the tube.The tip 32, nt in an opening 34 in the burner Il as shown in Figure 1,has a lateral port 35 for delivering fuel from the burner Il, when theburner is turned on, into the ilash tube through an opening 36 in thetube 30 adjacent the port 35. The gas or other fuel thusdelivered intothe flash tube is conveyed through this tube to the pilot light where itis ignited, and the ilame flashes back through the tube and ignites theburner. The. telescoping engagement between the tubes 30 and 3| permitsadjustment of the injection tip 32 radially with respect to the torchhood. The outer end of each tube 30 is preferably open at 38.

The circular wall of the hood i6 has an inturned annular retentionflange 40 at its upper end, and the bottom of each tube 3| at its innerend has a generally transversely extending slot 42 which, by tilting theouterend of the flash tube upwardly as the device is viewed in Figure 2,is adapted to pass over the ange 40. The opposite ends of the slot 42are directed generally longitudinally, or the slot is otherwise shapedto form a retention lip 45 along one edge of the slot for interlockingengagement with the ange 40 when the tube is placed in operatingposition. In its operating position, the flash tube is supported on thethe torch hood and is held detachably in place by its interlockingengagement with the flange. The resulting connection between the flashtube and the torch hood is of simple, inexpensive, and improvedcharacter, and permits not only easy removal of the ash tube forcleaning, but also permits movement of the tube slidingly around theannular flange to different positions about the periphery of the hood sothat the as'h tube may be disposed in any desired radial position.Moreover, the ilange and slot connection between andthisbaseflangeis thefiash tube and the torch hood permits swiveling or swinging movement ofthe tube in a vertical plane extending substantially through the axis ofthe hood to raise and lower the injection tip 32 at the outer end of theflash tube to any desired position.

The pilot adjusting valve i3 comprises a valve body threaded into thepipe or manifold l and which is adapted to.

provided with an inlet 33 leading from the manitold il, and an outlet 5lleading to the tube I2 which is secured to the valve body by a couplingnut 52. A passage 53 is provided between the inlet 60 and the outlet 5I.and a valve screw il threaded in the valve body is adapted to be turnedto adjust the communication between the inlet and the outlet, andthereby the pilot flame. The inner end of the valve screw 54 preferablyhas a V-shaped notch 56 or its otherwise formed in a manner to eliminategum deposits and clogging of the pilot adjusting valve. A nut 53 ispreferably provided for locking the adjusting screw 54 in adjustedposition.

I do not intend to be limitedto the 'precise details shown or described.

1. In a lighter of the class described, a pilot burner, a hood thereforhaving an opening in one side terminating above its lower edge, and afuel supply tube for said burner extending through said opening havingits end flattened flange 40 at the upper end of and thereby closedproviding a fiat substantially oblong terminal element with its longeraxis extending horizontally, said hood having an opening in its oppositeside terminating above its lower edge substantially conforming to saidterminal element, said terminal element projecting through the latter.opening and being bent at an angle at the outer face of said hood, saidterminal element cooperating with the body portion of said tube and withsaid hood for coniining the latter against relative movement verticallyand lengthwise of said tube in either direction.

2. In a lighter of the class described, a hood having openings in itsopposite sides, a fuelsupply tube extending through said openingssupporting said hood and p rovided with a port opening through its wallwithin said hood, and a pilot tip seating on said tube over said port toreceive fuel therefrom, said tip being secured to said tube at pointsspaced apart lengthwise thereof and being spaced from said tube betweensaid points providing space for admission of air.

3. A pilottip assembly for use in a lighter of the flash tube typecomprising a hood, a pilot tip within the hood, ash tubes leading fromsaid hood and tip, and a tube for supplying fuel to said burner having afuel outlet port; said tip comprising an outer member having ports atits upper end to be disposed adjacent the ends of the iiash tubes, andan inner member of less height than and disposed in concentric spacedrelation tosaid outer member, said inner member having a base flangeclosing the lower end of the space betweerf said inner and outermembers, said ange being inclined downward and outward of said innermember and defining an upwardly and inwardiy tapering fuel and airmixture inlet adapted to overlie the fuel outlet port of the fuel supplytube.

HENRY F. ALFERY.

